/* Copyright (c) 2006, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Sun Microsystems, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */


import table.TinySQLException;

/**
 * All AST nodes must implement this interface.
 * It provides basic machinery for constructing the parent and
 * child relationships between nodes.
 */
public interface Node {

    /**
     * This method is called after the node has been made the current
     * node.  It indicates that child nodes can now be added to it.
     */
    public void jjtOpen();

    /**
     * This method is called after all the child nodes have been
     * added.
     */
    public void jjtClose();

    /**
     * This pair of methods are used to inform the node of its
     * parent.
     */
    public void jjtSetParent(Node n);

    /**
     * Get this node's parent.
     */
    public Node jjtGetParent();

    /**
     * This method tells the node to add its argument to the node's
     * list of children.
     */
    public void jjtAddChild(Node n, int i);

    /**
     * This method returns a child node.  The children are numbered
     * from zero, left to right.
     */
    public Node jjtGetChild(int i);

    /**
     * Return the number of children the node has.
     */
    int jjtGetNumChildren();

    /************************* Added by Sreeni. *******************/

    /**
     * Interpret method
     */
    public void interpret() throws TinySQLException;

    public void dump(String s);
}
